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added dns preresolution

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This commit is contained in:
hyung-hwan 2014-09-12 14:11:47 +00:00
parent ffce4c94aa
commit 2ca7afd90c
7 changed files with 76 additions and 18 deletions
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14
qse/cmd/http/httpd.c
View File

@ -198,6 +198,7 @@ struct loccfg_t
int dns_queries;
int urs_timeout;
int urs_retries;
qse_httpd_mod_t* dns_preresolve_mod;
qse_httpd_mod_t* urs_prerewrite_mod;
qse_mchar_t pseudonym[128]; /* TODO: good size? */
} proxy;
@ -574,6 +575,7 @@ proxy_ok:
root->u.proxy.dns_server.tmout.sec = loccfg->proxy.dns_timeout;
root->u.proxy.dns_server.retries = loccfg->proxy.dns_retries;
root->u.proxy.dns_server.flags = loccfg->proxy.dns_queries;
root->u.proxy.dns_preresolve_mod = loccfg->proxy.dns_preresolve_mod;
}
if (loccfg->proxy.urs_enabled)
@ -1481,6 +1483,16 @@ static int load_loccfg_proxy (qse_httpd_t* httpd, qse_xli_t* xli, qse_xli_list_t
}
else cfg->proxy.dns_queries = QSE_HTTPD_DNS_SERVER_A | QSE_HTTPD_DNS_SERVER_AAAA;
pair = QSE_NULL;
if (proxy) pair = qse_xli_findpair (xli, proxy, QSE_T("dns-preresolve-hook"));
if (!pair && default_proxy) pair = qse_xli_findpair (xli, default_proxy, QSE_T("dns-preresolve-hook"));
if (pair)
{
cfg->proxy.dns_preresolve_mod = qse_httpd_findmod (httpd, ((qse_xli_str_t*)pair->val)->ptr);
if (!cfg->proxy.dns_preresolve_mod)
qse_printf (QSE_T("WARNING: dns-preresolve-hook not found - %s\n"), ((qse_xli_str_t*)pair->val)->ptr);
}
pair = QSE_NULL;
if (proxy) pair = qse_xli_findpair (xli, proxy, QSE_T("urs-enabled"));
if (!pair && default_proxy) pair = qse_xli_findpair (xli, default_proxy, QSE_T("urs-enabled"));
@ -1895,6 +1907,7 @@ static int open_config_file (qse_httpd_t* httpd)
{ QSE_T("server-default.proxy.dns-timeout"), { QSE_XLI_SCM_VALSTR | QSE_XLI_SCM_KEYNODUP, 1, 1 } },
{ QSE_T("server-default.proxy.dns-retries"), { QSE_XLI_SCM_VALSTR | QSE_XLI_SCM_KEYNODUP, 1, 1 } },
{ QSE_T("server-default.proxy.dns-queries"), { QSE_XLI_SCM_VALSTR | QSE_XLI_SCM_KEYNODUP, 0, 0xFFFF } },
{ QSE_T("server-default.proxy.dns-preresolve-hook"), { QSE_XLI_SCM_VALSTR | QSE_XLI_SCM_KEYNODUP, 1, 1 } },
{ QSE_T("server-default.proxy.urs-enabled"), { QSE_XLI_SCM_VALSTR | QSE_XLI_SCM_KEYNODUP, 1, 1 } },
{ QSE_T("server-default.proxy.urs-server"), { QSE_XLI_SCM_VALSTR | QSE_XLI_SCM_KEYNODUP, 1, 1 } },
{ QSE_T("server-default.proxy.urs-timeout"), { QSE_XLI_SCM_VALSTR | QSE_XLI_SCM_KEYNODUP, 1, 1 } },
@ -1950,6 +1963,7 @@ static int open_config_file (qse_httpd_t* httpd)
{ QSE_T("server.host.location.proxy.dns-timeout"), { QSE_XLI_SCM_VALSTR | QSE_XLI_SCM_KEYNODUP, 1, 1 } },
{ QSE_T("server.host.location.proxy.dns-retries"), { QSE_XLI_SCM_VALSTR | QSE_XLI_SCM_KEYNODUP, 1, 1 } },
{ QSE_T("server.host.location.proxy.dns-queries"), { QSE_XLI_SCM_VALSTR | QSE_XLI_SCM_KEYNODUP, 0, 0xFFFF } },
{ QSE_T("server.host.location.proxy.dns-preresolve-hook"), { QSE_XLI_SCM_VALSTR | QSE_XLI_SCM_KEYNODUP, 1, 1 } },
{ QSE_T("server.host.location.proxy.urs-enabled"), { QSE_XLI_SCM_VALSTR | QSE_XLI_SCM_KEYNODUP, 1, 1 } },
{ QSE_T("server.host.location.proxy.urs-server"), { QSE_XLI_SCM_VALSTR | QSE_XLI_SCM_KEYNODUP, 1, 1 } },
{ QSE_T("server.host.location.proxy.urs-timeout"), { QSE_XLI_SCM_VALSTR | QSE_XLI_SCM_KEYNODUP, 1, 1 } },

27
qse/include/qse/http/httpd.h
View File

@ -99,6 +99,13 @@ typedef void (*qse_httpd_mod_unload_t) (
qse_httpd_mod_t* mod
);
typedef int (*qse_httpd_mod_dns_preresolve_t) (
qse_httpd_mod_t* mod,
qse_httpd_client_t* client,
const qse_mchar_t* host,
qse_nwad_t* nwad
);
typedef int (*qse_httpd_mod_urs_prerewrite_t) (
qse_httpd_mod_t* mod,
qse_httpd_client_t* client,
@ -121,6 +128,7 @@ struct qse_httpd_mod_t
/* module's entry point may set these items */
void* ctx;
qse_httpd_mod_unload_t unload;
qse_httpd_mod_dns_preresolve_t dns_preresolve;
qse_httpd_mod_urs_prerewrite_t urs_prerewrite;
/* more fields will get added here for expansion in the future. */
@ -196,7 +204,7 @@ struct qse_httpd_urs_server_t
/* -------------------------------------------------------------------------- */
typedef void (*qse_httpd_resol_t) (
typedef void (*qse_httpd_resolve_t) (
qse_httpd_t* httpd,
const qse_mchar_t* name,
const qse_nwad_t* nwad,
@ -215,6 +223,14 @@ typedef void (*qse_httpd_rewrite_t) (
);
typedef int (*qse_httpd_dns_preresolve_t) (
qse_httpd_t* httpd,
qse_httpd_client_t* client,
const qse_mchar_t* host,
qse_nwad_t* nwad
);
typedef int (*qse_httpd_urs_open_t) (
qse_httpd_t* httpd,
qse_httpd_urs_t* urs
@ -389,8 +405,10 @@ struct qse_httpd_scb_t
void (*close) (qse_httpd_t* httpd, qse_httpd_dns_t* dns);
int (*recv) (qse_httpd_t* httpd, qse_httpd_dns_t* dns, qse_ubi_t handle);
int (*send) (qse_httpd_t* httpd, qse_httpd_dns_t* dns,
const qse_mchar_t* name, qse_httpd_resol_t resol,
const qse_mchar_t* name, qse_httpd_resolve_t resol,
const qse_httpd_dns_server_t* dns_server, void* ctx);
qse_httpd_dns_preresolve_t preresolve;
} dns;
struct
@ -737,6 +755,7 @@ struct qse_httpd_rsrc_proxy_t
qse_httpd_dns_server_t dns_server;
qse_httpd_urs_server_t urs_server;
qse_httpd_mod_t* dns_preresolve_mod;
qse_httpd_mod_t* urs_prerewrite_mod;
/* optional pseudonym to use for Via: */
@ -1165,10 +1184,10 @@ QSE_EXPORT qse_mchar_t* qse_httpd_escapehtml (
const qse_mchar_t* str
);
QSE_EXPORT int qse_httpd_resolname (
QSE_EXPORT int qse_httpd_resolvename (
qse_httpd_t* httpd,
const qse_mchar_t* name,
qse_httpd_resol_t resol,
qse_httpd_resolve_t resol,
const qse_httpd_dns_server_t* dns_server,
void* ctx
);

30
qse/lib/http/httpd-proxy.c
View File

@ -72,6 +72,7 @@ struct task_proxy_t
qse_mchar_t* pseudonym;
qse_htrd_t* peer_htrd;
qse_httpd_mod_t* dns_preresolve_mod;
qse_mchar_t* peer_name;
qse_uint16_t peer_port;
@ -948,9 +949,9 @@ static int task_init_proxy (
if (arg->rsrc->flags & QSE_HTTPD_RSRC_PROXY_ENABLE_DNS)
{
proxy->peer_name = proxy->pseudonym + len + 1;
qse_mbscpy (proxy->peer_name, arg->rsrc->dst.str);
adjust_peer_name_and_port (proxy);
proxy->dns_preresolve_mod = arg->rsrc->dns_preresolve_mod;
proxy->flags |= PROXY_RESOLVE_PEER_NAME;
if (arg->rsrc->flags & QSE_HTTPD_RSRC_PROXY_DNS_SERVER)
@ -989,7 +990,7 @@ printf (">>>>>>>>>>>>>>>>>>>>>>>> [%s] <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n", proxy
if (x == 0)
{
/* prerewrite() indicates that proxy->url_to_rewrite is the final
* rewriting result and no futher rewriting is required */
* rewriting result and no further rewriting is required */
proxy->flags |= PROXY_URL_PREREWRITTEN;
}
@ -2143,14 +2144,31 @@ static int task_main_proxy (
if (proxy->flags & PROXY_RESOLVE_PEER_NAME)
{
/* arrange to resolve a host name and return */
int x;
QSE_ASSERT (proxy->peer_name != QSE_NULL);
if (qse_httpd_resolname (httpd, proxy->peer_name, on_peer_name_resolved,
((proxy->flags & PROXY_DNS_SERVER)? &proxy->dns_server: QSE_NULL), task) <= -1) goto oops;
if (proxy->dns_preresolve_mod && proxy->dns_preresolve_mod->dns_preresolve)
x = proxy->dns_preresolve_mod->dns_preresolve (proxy->dns_preresolve_mod, client, proxy->peer_name, &proxy->peer.nwad);
else
x = httpd->opt.scb.dns.preresolve (httpd, client, proxy->peer_name, &proxy->peer.nwad);
if (x <= -1) goto oops;
if (x == 0)
{
/* preresolve() indicates that proxy->peer.nwad contains the
* final address. no actual dns resolution is required */
proxy->flags |= PROXY_PEER_NAME_RESOLVED;
proxy->flags &= ~PROXY_RESOLVE_PEER_NAME;
qse_setnwadport (&proxy->peer.nwad, qse_hton16(proxy->peer_port));
}
else
{
x = qse_httpd_resolvename (httpd, proxy->peer_name, on_peer_name_resolved, ((proxy->flags & PROXY_DNS_SERVER)? &proxy->dns_server: QSE_NULL), task);
if (x <= -1) goto oops;
}
/* if the name could be resolved without sending a request
* in qse_httpd_resolname(), on_peer_name_resolve would be
* in qse_httpd_resolvename(), on_peer_name_resolve would be
* called. */
if (proxy->flags & PROXY_INIT_FAILED)
{

12
qse/lib/http/httpd-std-dns.h
View File

@ -153,7 +153,7 @@ struct dns_req_t
qse_uint8_t* dn;
qse_size_t dnlen;
qse_httpd_resol_t resol;
qse_httpd_resolve_t resol;
void* ctx;
qse_uint8_t qa[DNS_MAX_DN_LEN + QSE_SIZEOF(dns_hdr_t) + QSE_SIZEOF(dns_qdtrail_t)];
@ -795,7 +795,7 @@ printf (">>tmr_dns_tmout_handle req->>%p\n", req);
dc->req_count--;
}
static int dns_send (qse_httpd_t* httpd, qse_httpd_dns_t* dns, const qse_mchar_t* name, qse_httpd_resol_t resol, const qse_httpd_dns_server_t* dns_server, void* ctx)
static int dns_send (qse_httpd_t* httpd, qse_httpd_dns_t* dns, const qse_mchar_t* name, qse_httpd_resolve_t resol, const qse_httpd_dns_server_t* dns_server, void* ctx)
{
dns_ctx_t* dc = (dns_ctx_t*)dns->ctx;
httpd_xtn_t* httpd_xtn;
@ -942,3 +942,11 @@ oops:
}
return -1;
}
static int dns_preresolve (qse_httpd_t* httpd, qse_httpd_client_t* client, const qse_mchar_t* host, qse_nwad_t* nwad)
{
/* do nothing */
return 1; /* unhandled */
}

1
qse/lib/http/httpd-std-urs.h
View File

@ -538,7 +538,6 @@ static int urs_prerewrite (qse_httpd_t* httpd, qse_httpd_client_t* client, qse_h
url_to_rewrite = qse_httpd_allocmem (httpd, total_len);
if (url_to_rewrite == QSE_NULL) return -1;
if (mtype == QSE_HTTP_CONNECT || !host_ptr)
{
host_ptr = QSE_MT("");

3
qse/lib/http/httpd-std.c
View File

@ -2389,7 +2389,8 @@ static qse_httpd_scb_t httpd_system_callbacks =
dns_open,
dns_close,
dns_recv,
dns_send
dns_send,
dns_preresolve
},
/* urs */

3
qse/lib/http/httpd.c
View File

@ -1853,7 +1853,7 @@ qse_mchar_t* qse_httpd_escapehtml (qse_httpd_t* httpd, const qse_mchar_t* str)
/* ----------------------------------------------------------------------- */
int qse_httpd_resolname (qse_httpd_t* httpd, const qse_mchar_t* name, qse_httpd_resol_t resol, const qse_httpd_dns_server_t* dns_server, void* ctx)
int qse_httpd_resolvename (qse_httpd_t* httpd, const qse_mchar_t* name, qse_httpd_resolve_t resol, const qse_httpd_dns_server_t* dns_server, void* ctx)
{
printf ("DNS_SEND.........................\n");
if (!httpd->dnsactive)
@ -1862,7 +1862,6 @@ printf ("DNS_SEND.........................\n");
return -1;
}
return httpd->opt.scb.dns.send (httpd, &httpd->dns, name, resol, dns_server, ctx);
}